POLYDACTYLY, A SUB-LETHAL CHARACTER IN THE PIGEON

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Abstract
A variable syndrome including polydactyly of feet and wings, shortened legs, undershot beak, short nestling down, and defective plumage was found in a family of Silver King pigeons. Of 25 specimens, none survived to maturity. Breeding data show that a simple recessive pleiotropic factor is responsible, which is symbolized py. A somewhat similar condition was also found in an unrelated family, and appears to be similar in inheritance but not allelic with the previous type.

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